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mpls: fix warning with multi-label encap
[ Upstream commit2f3f7d1fa0
] If you configure a route with multiple labels, e.g. ip route add 10.10.3.0/24 encap mpls 16/100 via 10.10.2.2 dev ens4 A warning is logged: kernel: [ 130.561819] netlink: 'ip': attribute type 1 has an invalid length. This happens because mpls_iptunnel_policy has set the type of MPLS_IPTUNNEL_DST to fixed size NLA_U32. Change it to a minimum size. nla_get_labels() does the remaining validation. Fixes:e3e4712ec0
("mpls: ip tunnel support") Signed-off-by: George Wilkie <gwilkie@vyatta.att-mail.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -28,7 +28,7 @@
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#include "internal.h"
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static const struct nla_policy mpls_iptunnel_policy[MPLS_IPTUNNEL_MAX + 1] = {
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[MPLS_IPTUNNEL_DST] = { .type = NLA_U32 },
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[MPLS_IPTUNNEL_DST] = { .len = sizeof(u32) },
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[MPLS_IPTUNNEL_TTL] = { .type = NLA_U8 },
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};
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